Department of Electrical and Computer Engineering, Islamic Azad University, Qazvin Branch, Qazvin, Iran Department of Computer Science and Electrical Engineering, Control Engineering Group, Luleå University of Technology, Luleå, Sweden
Receive Date: 24 December 2009,
Revise Date: 29 April 2010,
Accept Date: 08 May 2010
Abstract
This paper undertakes the synthesis of a logic-based switching H2/H∞ state-feedback controller for continuous-time LTI singular perturbation systems. Our solution achieves a minimum bound on the H2 performance level, while also satisfying the H∞ performance requirements. The proposed hybrid control scheme is based on a fuzzy supervisor managing the combination of two controllers. A convex LMI-Based formulation of two fast and slow subsystem controllers leads to a structure which ensures a good performance in both transient and steady-state phases. The stability analysis leverages on the Lyapunov technique, inspired from the switching system theory, to prove that a system with the proposed controller remains globally stable in the face of changes in configuration (controller).
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